Investigation of target in C-ADS and IAEA ADS benchmark

TL;DR

This paper studies how the spatial and energy distribution of spallation neutrons affect the performance of Accelerator Driven Subcritical systems, highlighting the positive impact of backward neutrons on proton efficiency and potential design improvements.

Contribution

It provides new insights into the influence of spallation neutron distributions on system efficiency and suggests optimizing target radius to enhance performance.

Findings

Backward neutrons have a significant ratio when the spallation region radius increases.

Increasing the target radius can improve proton efficiency by utilizing backward neutrons.

The study offers guidance for designing more effective subcritical core systems.

Abstract

The spatial and energy distribution of spallation neutrons have an effect on the performance of Accelerator Driven Subcritical systems. In this work, the spatial, energy distribution of spallation neutrons and the effect of these factors on proton efficiency was studied. When the radius of spallation region increases, backward neutrons were found to have a rather big ratio and have a positive effect on proton efficiency. By making better use of these neutrons, we may increase the radius of target to satisfy some other requirements in the design of subcritical core.